Fuse plug



F. W. BOYD.

FUSE PLUG. APPLICA'TLON HLED Aus,1s,1919.

1,416,602. x Patented May 16, 1922.

wventoz UNITED 's'r'Arss PATENT OFFICE.

FRANK W. BOYB, F SPOKANE, WSHNGTON, ASSIGNO'R OF ONE-THIRD T0 JOSEPH. A.

i OCO'NNELEI, @JF SPOKANE, TU.ASIHINGr'UON'.`

FUSE PLUG.

inraooa Specieation of Letters Patent. Paented May 16, 1922n application filed August le, 1919. Serial No. 318,3Gl.

To whom it may concern: it known that ll., FRANK llliorn, citizen of the United States, l g Spe ue, inSpolrane County and mate or `Wa.nii1gtor 1, have invented certain new and use-lul Improvements in Fuse of which the following is' a specioatiou The present invention relates to M ments in fuse plugs of the quick, detac.

lo screw' plug type of connector, is de; signed to provide a plug ot th 1s ol racter in which the fusernay be readily i oved tailed escape after the fuse has been burn invention.

. Figure l is side view or a iuse plug einse boflving the novel features oi the i vention.

@Sure 2 is a vertical sectional view of the G is top plan view oi the plug Figure l is e side view oi the stein and fuse detached.

l ure 5 is a seetional view oit the top dish lor the hase.

the preferred orrn of the V.as illustrated in the drav the standard poreelair lug base l is f.

threadedv to ree i o vention the shell or which also is threaded .as u and the upper open end of the oase" is 'Closed by rneans of the closure or topo disk ot insulation material circular in form as shown. r)The top or dislr is held ie base hv ineens olli the :metal sap 'l l ung the tui le in annular 4r xviii l 5o the shoul 5 olf eures the disk rigi tion rlhe disk is walls the center e screw ithrealed oetal lining 5 to receive the iluso stem which has an upper threaded portion 7 engage and be threaded into the disk, a head 8 on the stein being provided for turning the stem into place. TheT fuse 9 is incased .within a groove in the tace ot the stem 6 as usual and has at its lower end vthe terrninal l0 formed as a ball which is adapted to tit into the socket ll that is fashioned on the fixed Contact head 'l2 at the lower end of the plug, the connector thus being formed similar to a ball and socket or glove fastener ot the snap type, well known in use; rl`he fuse ribbon is thus soldered at one end to the threaded, brass, portion of the stem at one end, and at its other end to the ball member, the detachable stern being oom'- pleted with the inclusion ofthe head 8 by which it may he manipulated.

The stern thus is held by its connection at one end with the Contact head l2 through the hall and socket joint making a snap joint, and at the other end by the screw threaded eonneotion between the stem and the dislr 3, which as before stated is insulation material. ln this manner the; fuse may be quiolrly replaced if neoessary by inserting the ball end of the stern through. the opening in the disk and passing the stern through the hollow base block or member, and snapping the hall and socket members together in manner well understood.

rlihe metallic conductor i8 forming conneoton with the socket member of the disk is aeoonimodated by a slot lll in the upper part of the base, and this conductor is welded or soldered to the lining 5 of the disk and extends outwardly into Contact with the shell ,Q3 of the plug. lo protect the conductor from the llame or blaze that might flash up in the plug, anintegral overhanging tongue is provided 'to shield conductor as it lies' inthe slot itl provided for it, and preferably, vent openings 16 are provided in the top of the base of the plug as shown-in lligure 3, extending out radially, under the disk or cover of the plug. The plug is sorewed into the socket in usual manner, and the engagements are 'made withthe contacts in the eoelret or receptacle through the Contact shell and contact head in well lmown man# ner. From the abovedesoription taken in oonneotion with my drawings it is evident that lf haveprovided a vfuse plug that., by its Construction arrangement parts attains results in a more satisfactory and eco 'lli lll@

Ulli

mealllu wncluco Sp extended if., 'n the Covm t@ lll@ shell, and means fol' slueldmg sait! sul@ 'for 'lle pmposs described.

The wmbinnton in a fuse plug Wl'll a hollow has@ member having un lnfmllly Qlojcnz@ ntglul longue und am 01 md u awe? having; 21 tluaild @Gulf ing? of u 'luso Siem flumled in said. opfmng, a fuss im the Stam, an exterior shall @n th@ .base melnlkelg a metallic comfluctol' Strip l 'encled from ille central opening of flle, @over @peni con-mw Shell @ndrebay opemng n 'is "alle conlzlc shella a ball im lille mi Mumien Mang@ uuml' 524m sinfulm fuse siem 'lu'eadefl in Smid llrefiflml 4U" amd a. fuse in lle fff'em, am s L on the has@ mamlyzf@ a p Qfitendxsd 1:23am 'L bha @over luouggl 'ille open E] en@ m' walled in l 0 Receive said am? and :1 Contact hemd. Humber having' a Sockel; t 

